Identity Tests Parity

1. Added a base model to identity for tempest parity.
2. Renamed the base model to fixtures model.
3. Fixed all review related issues.
4. Moved away all behavior functionality from fixtures.
5. Renamed branch
6. Cleaned up tests data in identity fixtures.

Change-Id: Ifce961c96be8fe6d677475b4bc5b9cd03a6a6576
Merge "Identity Tests Parity"